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INVESTMENT ACTIVITY (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 21 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 20, 2025 USD ($) facility | Dec. 31, 2024 USD ($) item facility loan property | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) facility | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) facility property | Sep. 30, 2025 USD ($) property
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 4 |
Aggregate purchase price |  |  |  |  |  |  | $ 42,200 |
Mortgage loans and notes payable, net |  | $ 205,915 | $ 204,681 |  | $ 204,681 |  | 205,915 | $ 204,681
Leases, Acquired-in-Place | 2024 Acquisitions |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Intangible value of the in-place leases |  | $ 2,000 |  |  |  |  | $ 2,000 |
Estimated life |  | 12 months |  |  |  |  | 12 months |
Amortization expense |  |  | 300 | $ 200 | 900 | $ 600 |  |
HVP IV |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Aggregate purchase price | $ 452,800 |  |  |  |  |  |  |
Percentage of voting interest acquired | 80.00% |  |  |  |  |  |  |
Total consideration | $ 466,900 |  |  |  |  |  |  |
Acquisition, previously held equity interest | 14,100 |  |  |  |  |  |  |
Acquisition, gain (loss) recognized | 0 |  |  |  |  |  |  |
Repayments of debt | 44,400 |  |  |  |  |  |  |
HVP IV | Leases, Acquired-in-Place |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Intangible value of the in-place leases | $ 32,000 |  |  |  |  |  |  |
Estimated life | 12 months |  |  |  |  |  |  |
Amortization expense |  |  | 8,000 |  | $ 18,700 |  |  |
Joint Venture |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Ownership interest held by the entity (as a percent) |  |  |  |  | 85.00% |  | 85.00% |
HVP IV |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities | property |  | 28 |  |  |  |  | 28 |
Percentage of voting interest acquired | 80.00% |  |  |  | 80.00% |  |  |
Percentage of voting interest previously acquired | 20.00% |  |  |  |  |  |  |
Aggregate sale price | $ 452,800 |  |  |  |  |  |  |
Number of real estate properties owned | facility | 28 |  |  |  | 28 |  |  |
Repayments of debt | $ 44,400 |  |  |  | $ 44,400 |  |  |
HVP IV | Texas |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 8 |  |  |  |  |  |  |
HVP IV | Florida |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 4 |  |  |  |  |  |  |
HVP IV | Maryland |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 2 |  |  |  |  |  |  |
HVP IV | Connecticut |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 3 |  |  |  |  |  |  |
HVP IV | Pennsylvania |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 1 |  |  |  |  |  |  |
HVP IV | Arizona |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 2 |  |  |  |  |  |  |
HVP IV | Illinois |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 5 |  |  |  |  |  |  |
HVP IV | Georgia |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 2 |  |  |  |  |  |  |
HVP IV | Minnesota |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility | 1 |  |  |  |  |  |  |
Hines Portfolio December 2024 |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Percentage of voting interest acquired |  |  |  |  |  |  | 85.00% |
Hines Portfolio December 2024 | Leases, Acquired-in-Place | 2024 Acquisitions |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Intangible value of the in-place leases |  | $ 10,100 |  |  |  |  | $ 10,100 |
Estimated life |  | 12 months |  |  |  |  | 12 months |
Amortization expense |  |  | 2,500 | $ 0 | 7,600 | $ 0 |  |
Self storage under construction | New York |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Development costs |  |  | 25,800 |  | 25,800 |  |  | 25,800
Expected construction cost |  |  | $ 27,200 |  | $ 27,200 |  |  | $ 27,200
Self Storage Facilities in New York and New Jersey |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of stores | property |  |  |  |  |  |  |  | 3
2025 Acquisitions |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  | 28 |  |  |
Aggregate purchase price |  |  |  |  | $ 452,785 |  |  |
2025 Acquisitions | HVP IV |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  | 28 |  |  |
Aggregate purchase price |  |  |  |  | $ 452,785 |  |  |
2024 Acquisitions |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 18 |
Aggregate purchase price |  |  |  |  |  |  | $ 199,400 |
2024 Acquisitions | Connecticut |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 2 |
2024 Acquisitions | Oregon |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 1 |
2024 Acquisitions | Pennsylvania |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 1 |
2024 Acquisitions | Hines Portfolio December 2024 |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 14 |
Aggregate purchase price |  | $ 157,300 |  |  |  |  | $ 157,250 |
Percentage of voting interest acquired |  | 85.00% |  |  |  |  |  |
Number of consolidated joint ventures In portfolio | item |  | 7 |  |  |  |  |  |
Number of encumbered mortgage loans | loan |  | 2 |  |  |  |  |  |
Mortgage loans and notes payable, net |  | $ 115,400 |  |  |  |  | 115,400 |
Fair value |  | 115,800 |  |  |  |  | 115,800 |
Aggregate net premium |  | $ 400 |  |  |  |  | $ 400 |
2024 Acquisitions | Hines Portfolio December 2024 | Texas |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of real estate properties owned | facility |  | 14 |  |  |  |  |  |
2024 Acquisitions | Connecticut Assets January 2024 |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 2 |
Aggregate purchase price |  |  |  |  |  |  | $ 20,200 |
2024 Acquisitions | Oregon Asset November 2024 |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 1 |
Aggregate purchase price |  |  |  |  |  |  | $ 10,450 |
2024 Acquisitions | Pennsylvania Asset November 2024 |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Number of self-storage facilities acquired | facility |  |  |  |  |  |  | 1 |
Aggregate purchase price |  |  |  |  |  |  | $ 11,500 |
Cubesmart |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Ownership interest by Parent |  |  | 99.50% |  | 99.50% |  |  | 99.50%
Mortgage Loans |  |  |  |  |  |  |  |
INVESTMENT ACTIVITY |  |  |  |  |  |  |  |
Mortgage loans and notes payable, net |  | $ 205,915 | $ 204,681 |  | $ 204,681 |  | $ 205,915 | $ 204,681

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